<template>
  <div>
    <el-breadcrumb separator-class='el-icon-arrow-right'>
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>

    <!--卡片视图区域-->
    <el-card>
      <el-row>
        <el-col>
          <el-button type='primary'
                     @click='showAddCateDialog'>
            添加分类
          </el-button>
        </el-col>
      </el-row>
      <!-- 表格 -->
      <tree-table
        :data='cateList'
        :columns='columns'
        :selection-type='false'
        :expand-type='false'
        show-index
        index-text='#'
        border
        class='treeTable'
      >
        <template slot='isok' slot-scope='scope'>
          <i class='el-icon-success' v-if='scope.row.cat_deleted===false' style='color:lightgreen'></i>
          <i class='ek-icon-error' v-else style='color:red'></i>
        </template>
        <template slot='order' slot-scope='scope'>
          <el-tag size='mini' v-if='scope.row.cat_level===0'>一级</el-tag>
          <el-tag size='mini' type='success' v-else-if='scope.row.cat_level===1'>二级</el-tag>
          <el-tag size='mini' type='warning' v-else>三级</el-tag>
        </template>
        <template slot='opt'>
          <el-button type='primary' icon='el-icon-edit' size='mini'>编辑</el-button>
          <el-button type='danger' icon='el-icon-delete' size='mini'>删除</el-button>
        </template>
      </tree-table>
      <!-- 分页区域 -->
      <el-pagination
        @size-change='handleSizeChange'
        @current-change='handleCurrentChange'
        :current-page.sync='queryInfo.pagenum'
        :page-sizes='[3,5,10,15]'
        :page-size='queryInfo.pagesize'
        layout='total, prev, sizes,prev,jumper,pager, next'
        :total='total'>
      </el-pagination>
    </el-card>
    <!-- 添加分类对话框 -->
    <el-dialog
      title='添加分类'
      :visible.sync='addCateDialogVisible'
      @close='addCateDialogClosed'
      width='50%'>
      <el-form :model='addCateForm' :rules='addCateFormRules' ref='addCateFormRef' label-width='100px'>
        <el-form-item label='分类名称' prop='cat_name'>
          <el-input v-model='addCateForm.cat_name'></el-input>
        </el-form-item>
      </el-form>
      <el-form :model='addCateForm' :rules='addCateFormRules' ref='addCateFormRef' label-width='100px'>
        <el-form-item label='父级分类'>
          <el-cascader
            v-model='selectedKeys'
            :options='parentCateList'
            :props='cascaderProps'
            clearable
            change-on-select
            @change='parentCateChange'></el-cascader>
        </el-form-item>
      </el-form>
      <span slot='footer' class='dialog-footer'>
        <el-button @click='addCateDialogVisible = false'>取 消</el-button>
        <el-button type='primary' @click='addCate'>确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'cate',
  data () {
    return {
      addCateForm: {
        cat_name: '',
        cat_pid: 0,
        cat_level: 0
      },
      addCateFormRules: {
        cat_name: [
          {
            required: true,
            message: '请输入分类名称',
            trigger: 'blur'
          }
        ]
      },
      // 查询条件
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5,
        total: 0
      },
      cateList: [],
      addCateDialogVisible: false,
      columns: [{
        label: '分类名称',
        prop: 'cat_name'
      }, {
        label: '是否有效',
        type: 'template',
        template: 'isok'
      }, {
        label: '排序',
        type: 'template',
        template: 'order'
      }, {
        label: '操作',
        type: 'template',
        template: 'opt'
      }],
      parentCateList: [],
      cascaderProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      selectedKeys: []
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories', { params: this.queryInfo })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败！')
      }
      this.cateList = res.data.result
      this.total = res.data.total
    },
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getCateList()
    },
    showAddCateDialog () {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    async getParentCateList () {
      const { data: res } = await this.$http.get('categories', { params: { type: 2 } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取父级分类数据失败！')
      }
      this.parentCateList = res.data
    },
    parentCateChange () {
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length - 1]
        this.addCateForm.cat_level = this.selectedKeys.length
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    addCate () {
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('categories', this.addCateForm)

        if (res.meta.status !== 201) {
          return this.$message.error('添加分类失败！')
        }
        this.$message.success('添加分类成功！')
        this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    addCateDialogClosed () {
      // this.$refs.addCateFormRef.resetFields()
      this.selectedKeys.length = 0
      this.addCateForm.cat_level = 0
      this.addCateForm.cat_pid = 0
      this.addCateForm.cat_name = ''
    }
  }
}
</script>

<style scoped>
.treeTable {
  margin-top: 15px;
}

.el-cascader {
  width: 100%;
}
</style>
